Work holder for mounting between jaws of a vise to support or clamp a workpiece



Sept. 13, 1949. s. E. w. HOENES 2,432,002

WORK-HOLDER FOR MOUNTING BETWEEN JAWS OF A VISE TO SUPPORT OR CLAMP AWORKPIECE Filed March 24, 1945 MJF/J'L/ ATTOHNEK atented Sept. 13, 1949WORK HOLDER FOR MOUNTING BETWEEN JAWS OF A VISE TO SUPPORT OR CLAMP AWORKPIECE Samuel Erwin W. Hoenes, East Hempstead, N. Y., assignor toRepublic Aviation Corporation, Farmingdale, N. Y., a corporation ofDelaware Application March 24, 1945, Serial No. 584,652

2 Claims. 1

This invention relates to holders designed to be interposed between awork piece and a clamp, vise or other gripping device for the protectionof the work piece upon the clamping or gripping engagement thereof.

In short this invention resides particularly in a hollow holder thatwill contain and support a component of an assembly, such as a piston,while it is clampingly engaged during the adjustment and manipulation ofa companion or coacting element, such as a piston rod, the holderincluding means on its exterior surface to independently support it in aclamping device and also means to provide sufiicient resiliency in theholder to permit it to uniformly clamp against the surface of theengaged component when acted on by the clamping device and further meanson its interior surface to support the engaged component upon theremoval of the pressure of the clamping device.

With the above and other objects in view as will be apparent, thisinvention consists in the construction, combination and arrangement ofparts all as hereinafter more fully described, claimed and illustratedin the accompanying drawings, wherein:

Fig. 1 is a perspective view of a form of the present holder;

Fig. 2 is an end elevation thereof;

Fig. 3 is a side elevation thereof;

Fig. 4 is a vertical section through the holder illustrating the same incooperation with the piston and piston rod of the compensating valve ofthe master brake cylinder of an aircraft; and

Fig. 5 is an elevation of a vise illustrating the present inventionengaging and supporting a piston and rod therein.

In the assembly, adjustment and dismantling of composite structures, as,for example, a piston and its rod, it is customary to clamp or grip oneof the components or elements thereof and thereby hold it againstmovement while the companion or complemental element is manipulated.Since the clamp or vise which holds the engaged element usuallycomprises two opposed jaws which are moved into clamping engagement withthe element, there is an uneven distribution of pressure upon the partbeing gripped or clamped. This, of course, results in the partialengagement of the element or part and frequently dents, scratches andotherwise mars its surface. In the case of highly polished elements orcomponents, as, for example, the piston and piston rod of thecompensating valve of the master brake cylinder of an aircraft, this isparticularly undesirable.

The present invention proposes a holder which will embrace the partsbeing assembled, adjusted or dismantled and coact with and cover theentire engaged surface thereof, whereby it is insulated from contactwith the clamp or vise. This holder is so constructed that it willcooperate with the jaws of a vise or clamp to receive the pressurethereof transmitting it to and distributing it over the entire engagedsurface of the gripped or clamped element.

This prevents any contact between the clamp or vise and the structureoperated upon and at the same time supports the same within the vise orclamp prior to the application of any clamping or engaging pressurethereon.

Reference being had more particularly to the drawings, Ill designatesthe present holder which comprises a hollow or tubular body having oneend closed by an end wall II provided with a central aperture l2. Theopposite or open end of the body i0 is provided with a pair ofdiametrically opposed flanges [3 which flanges are the result of cuttingaway the opposed sides of said body to form a pair of flat parallelfaces M which, when the device is engaged within a clamp or vise,contact with and rest flush against the jaws thereof as will behereinafter more fully described.

Midway between the flat faces l4 and between the flanges I3 the wall ofthe body I0 is split longitudinally, as at I5, parallel to thelongitudinal axis thereof; the slot l5 thus formed having its sidesspaced one from the other. The inner surface of the wall of the body [0diametrically opposed to the slot I5 is provided with a groove l6extending throughout the length of the wall and through the end wall H.As illustrated in the drawing the extension 15' of the slot l5 splitsthe end wall H and terminates at and in communication with the grooveIS. Thus the body l0 may be said to be divided by the slots l5-|5' intotwo halves resiliently connected to each other at the groove I6.

The structure above described is preferably made from a single sectionof metal stock of a diameter substantially equal to the overall diameterof the holder at the flanges [3. The opposed parallel fiat surfaces l4may then be cut therein and the interior bored out to create the innerpassage l'l terminating at the end wall H. The concentric opening it inthe end wall, the slot l5 and its extension l5, as well as the groovel6, may then be cut into the body by any desired means. The foregoing ismerely explanatory of a manner in which the tool may, if desired, bemade. It is to be understood, however, that the method of making thesame forms no part of the present invention and that the foregoing ismerely explanatory.

It is tolbe' observed: that the extension. l'5' of the slot f5;locatedin the end wall ll; substantially bisects the end wall as well asthe opening. [2 therein and lies parallel to the opposed par allel fiatfaces Id of the device: Thus assabovee noted, the halves of the body;lflldbnneflifidiaktl the point of minimum thickness of the wall thereof,may be compressed resiliently by, the. appli-- cation of pressure uponthe. opposed-L exterior; faces M. In order to distribute? thehclanrpingfpressure of the holder evenly over the entire outer surface of theengaged element, this-relative movement of the halves of the body; I0 isnecessarily very small. Moreover, due to the groove l6.the. material ofthe body I0 adjacent the groove; IBtends to' bow. or bend outwardly thusofisett'ing' to a large extent the. tendency, of" the halves" of? thebody I 9 to pivot about' this por tion of the wall} and" with the resultthat" the halves of. thepbody) move and're'main substane tie-11yparallel" during the clamping. and holding oi" the: engaged" element;

In Figs. land 5 is illustratedia use of the pres:- ent invention. Here apiston l9. and its-rod I8.

are to,..be held duringthe'assemblyor-dismantling' thereof by) the:removal or insertion. of the nut 20', .th'readedj into' the" piston I 9"in' opposition to." therod" Illtohold a' valve 2'1" in place within"the" piston: T-h'e" pist'orrrod IB 'is' passed'through'the aperture [2in theendwall l l-of the-tool, while the piston itself is'* receivedwithin thepassage ject beyondtheplane of' the outer end of *the body HYas illustrated. Withthetool thus-'posi tioned upon-the-work pie'eethewhole is ins'erted in-the vise-22- with-theoppos'ed parallel"surfaces-=I l of the body incontact with the j aws 23* oi the vise,andthenpposedfianges l 3resting"upon* the upper edges of said jaws. Thusthe flanges" support thepresent holden and tl'ie'structure-bar ri'edbyjit within' the vise prior to and-in advance of any-grippingorclamping-'engagement 'thereof by the jaws 23 of the vise. The jaws 23arethe'nmoved-toward one-anotherin-tliestandard mam ner" exerting auniform clampingon gripping pressure-upon the opposed "parallel flatfaeesc M oi the toolill. This pressure of the jaws" 23 causesthe opposedsidesor halves of: the tool created' by the slots [B -l5 to compress ormove toward eac-h other thereby reducing slightly-the width ofthe slotIE-IE" and'ialse the insid-diameter of the=passage or pocket I T:action: of' the opposed lialvesof-the tool is assistedtbythe grooi' e I6 in reducing thdthiekness oitlriew'all of theholder opposite this slotI5=E The movement of the two jaws; thus" created im the holder isrelatively: slightcblat? it distributes the;

clamping pressure from the: jawsa23, of-Ethe vise: oven-the:- entiresurface: of the: piston: l llzztherebfy rigidly: engaging: it',-'without an concentration: of;

forces, and holding the piston fixed while the unit is dismantled orassembled by manipulation of the nut 20. The releasing of the pressureon the faces l4 permits the halves of the holder to separate and releasethe engaged member. 19.

While-athe': instant tool has been described in connection with aparticular structure, to Wit: the piston and rod of a compensating valveof the master brake cylinder of an aircraft, it can, of: eou'rswby?relatively slight modifications, be applied toothenstructures anddevices.

What olaimediss L. A holder. comprising a hollow body open at one. endand; provided with an apertured wall partially-closing itssopposite end,a pair of opposed, parallel exterior surfaces terminating inspacedrelatiomto' ttieopen end of the body, a pair oflflangesdocatedabove said parallel surfaces and projecting outwardly from the body inopposite directions, said body,having an internal longitudinalgroovdformediii abody. walliand extending, parallel to and medially,between said.- surfaces,, an'd'la longitudinalslot"extendihg'entirely,through. a' body wall diametrically opposite.saidigrooveuto.

provide spaced faces parallel'with saidlsunfaces,

" on a diameter of. the opening therein,, and; a

groovein saidbo'dyin' opposition t'o'sai'd longi, tu'dina'lsloti SAMUEUERWIN'W; HOENES.

REFERENCES CITED Thee following references: are: of.- reeord' in]v thefile of this patent:

UNITED STATES 1,311,986".- Miles. H ...W ..Aug.. 5, 191% eeaeaz. StaleyAug..17; 1.920 1,372,665.. Alexander. Mar4 29 1921. 1,456,365 DanielsonMay, 22, 19231. 1,672,808, Hansel. June 5, 1928 1,721,111.. Grail.Jilly, 16,.1929. 1,724,599. Nelson Aug..l3, 1929. l,895;28l1.-. CurrieJan. 24, 1933. 2,242,080, Kurzina..s May. 13, ,19I4L REFERENGESn;

Ropular Mechanics, February issue, 1942':(page" 1 18.) L

